C++ Class Extension

Question

Is there a way to add new methods to a class, without modifying original class definition (i.e. compiled .lib containing class and corresponding .h file) like C#\'s class ex

Answer 1

No. C++ has no such capability.

As mentioned in other answers, the common workarounds are:

• Define a derived class, perhaps with a factory to hide the actual implementation class
• Define a decorator class
• Define non-member functions that operate on instances of the class